Nut Slotting Gauge

  • 62 Reviews
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A revolution in guitar setup! Precisely measures string heights, so you can cut accurate nut slots for consistent playability.

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Nut Slotting Gauge For guitar and most instruments

For guitar and most instruments

Item # 2003
In stock, ready to ship!

$59.94

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Nut Slotting Gauge For bass

For bass

Item # 2006
In stock, ready to ship!

$68.47

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Quantity: 20

Product Video

Nut Slotting Gauge

Dan Erlewine uses the Nut Slotting Gauge: the most accurate measure of nut slot depth.


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Product Details

A revolution in guitar setup! Precisely measures string heights, so you can cut accurate nut slots for consistent playability.

This device that will revolutionize the way you set up a guitar.
The Nut Slotting Gauge quickly and precisely measures string heights over the first fret. When filing nut slot depths, you see your results more accurately than ever before. No more guesswork or "eyeballing" the string heights, and no more searching for elusive combinations of feeler gauges. You can custom-tailor the playability with consistent, repeatable results.

At last! A precision tool for establishing string heights!


The Nut Slotting Gauge was designed by Don MacRostie here in our R & D shop. It features an easy to read dial indicator with adjustable zero point, and it's super accurate to .001". The machined brass base fits over the strings to rest on the fingerboard, and it works with most acoustic and electric guitars, mandolins and banjos. A larger brass base is machined to fit bass string spacings. Both have gently arched bottoms to follow most any fretboard radius. Instructions are included.

The Nut Slotting Gauge is included in this money-saving set:
Nut Slotting Gauge and Neck Relief Gauge Set


Trade Secrets! Newsletter

Putting the new Nut Slotting Gauge to work on a "burn victim" guitar

Dan Erlewine shows a before and after of a 1958 Gibson that's (barely) survived a house fire. It needs a new nut, and he's using the Nut Slotting Gauge to get it right the first time.

Product Instructions

Nut Slotting Gauge Instructions

How to determine nut slot depth with the Nut Slotting Gauge.

Ratings & Reviews

Nut Slotting Gauge

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  • Based on 62 Reviews
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MEASURE - MEASURE - MEASURE

By Merle, NC
(Customer's Reviews) Wednesday, May 02, 2012


Quit guessing and start measuring. This is the tool to do it.

Super Quality Tool!

By KickAxe USA from Rifle, CO
(Customer's Reviews) Saturday, April 21, 2012


This is one of the most used tools I have! Don't know how I did without it for as long as I did. You can use this guage on EVERY setup you do. I have made it a habit to atleast check every guitar that goes through the shop with this guage. Almost every time I check one, I end up selling the extra work of lowering the strings at the nut. Most customers are willing to pay the few extra dollars to get a guitar back that plays like butter. It can be used to measure many other things to, but, this guage gets a workout on the setup bench in my shop!

Multi Tool

By Jerhico Guitars from Altona, NY
(Customer's Reviews) Thursday, March 29, 2012


Tons of uses if you adapt it to different jobs. Pricey.....kinda why I came up with other uses, lol. Works great! Thanks.

No More Feeler Gages!

By stratbasher from Maple Hts. Ohio
(Customer's Reviews) Wednesday, March 28, 2012


This is definitely worth the money and makes adjusting your neck setup or fine tuning your nut depths so much easier.It's well made and easy to use.

Time Saver

By Gordon Bellerose from Edmonton AB. Canada
(Customer's Reviews) Saturday, February 18, 2012


I use to have to measure string height with feeler guages; a real pain fumbling with them to re-measure for every string. The Nut Slotting Guage is quick and easy to use. A real time saver.
It works so well I bought the Bass Guitar guage also!

If you only buy one guitar tool this year...........

By the guitar fettler from sheffield
(Customer's Reviews) Monday, February 06, 2012


If you're wondering whether this works, take it from me ; it does! No more fiddly inaccurate feeler gauges when setting up, this will do nut slotting, setting the relief, setting the action and individual fret height. Admittedly there's a knack to using it but the saving in time and the 1/1000" accuracy more than make up for it. It'll do Basses without the specialised block too!

Excellent, but handle delicately

By markinsero from waterbury,ct
(Customer's Reviews) Sunday, February 05, 2012


I purchased this nut gauge and it works great. There are 2 issues. The dial actually works backwards, not a real big issue as you only need to see the difference with the string up and the string down. The second issue is to handle this device as carefully as possible. The moving stem has to move without any friction at all and with its own weight must move down to the string you are measuring. One single drop off my workbench and the moving stem no longer moves smoothly. Be very very careful with this tool. However I like it so much I just ordered another one and I learned that this is a very very delicate instrument. This mistake cost me $60.

* An Indispensable Tool *

By M Dawes from South Shields, England
(Customer's Reviews) Sunday, January 22, 2012


This was one of these tools that I read most of the reviews first as I usually do, but to be frank the reviews put me off a bit, but after struggling on putting a new Earvana nut on my 1973 strat and cutting the string slots to the right depth using the old feeler gauge method. I decided to order the Nut Slotting Gauge, I must say that most of the fears that I had from reading the reviews have disappeared, as I found using the gauge is so much easier than using the old feeler gauge method and it is far quicker too.

Yes I do agree with some of the reviews to a point, you do have to re-check and be careful, but I tend to think that this is due more to the nature of the neck radius that you are using the gauge on. I myself found that when using it to check my strat with a steep 7-1/4 radius fret board there was a little variation in the readings, but I found this mostly to do with the actual position of the gauge as it was too easy to allow the gauge to be measuring one side of the measuring tip and not in the middle. Once I ensured that the tip was centred on the string and the gauge block was sitting square, I found that I obtained very accurate repetitive readings, so much so that I decided to further re-cut the nut slots in the Earvana nut.

I completely re-cut all the slots in the nut far more accurately than using the old method. There is one thing for sure, this is a tool I will use extensively for nut slotting it is extremely accurate and it is now a tool I cannot do without, highly recommended.

Nut Slotting Gauge

By jackguitars from Sicklerville,NJ
(Customer's Reviews) Sunday, January 08, 2012


i Love this tool. i check all the heights with all of my 300 guitar's. i love all the tools i get from stew mac. it's really nice to show my friends this item. you can compare. easy to used. lol would be nice to have a build in file to cut nuts. life getting to easy. jack Sicklerville,NJ

Great Tool!

By Wilmer Gingerich from Jamesport MO
(Customer's Reviews) Saturday, December 17, 2011


Wow! What can I say? Ingenious device! Makes filing the string slots at the nut completely fool proof!!

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